Journal
ACS NANO
Volume 4, Issue 9, Pages 5382-5388Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn1009837
Keywords
single-walled carbon nanotube; spin coating; transparent film; electrode; free-standing film
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Funding
- Ministry of Education, Science and Technology (MEST), Korea
- National Research Foundation of Korea [2007-00015] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Oligothiophene-terminated poly(ethylene glycol) was synthesized and used as a non-ionic and amphiphilic surfactant for fabricating high-quality single-walled carbon nanotube (SWCNT) films by a simple spin coating method. The absence of charge repulsion between SWCNT/surfactant complexes successfully leads to formation of a dense network of SWCNTs on the substrate through a single deposition of spin coating. When the SWCNT film was treated with nitric acid and thionyl chloride after washed with dichloromethane and water, a high-performance SWCNT film with the sheet resistance of 59 ohm/sq and the transparency of 71% at 550 nm was successfully obtained. Since the SWCNT film exhibits a high value of sigma(dc)/sigma(ac) (similar to 17) and excellent dimensional stability after releasing from the substrate, the film can be used as a transparent electrode in flexible optoelectronic devices.
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